首页|Processing, Characterization and Properties of Specially Constituted Zr-Based Bulk Amorphous Alloys
Processing, Characterization and Properties of Specially Constituted Zr-Based Bulk Amorphous Alloys
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NETL
NSTL
Trans Tech Publications Ltd
Bulk metallic glasses (BMGs) are an emerging class of materials. The amorphous alloys have very attractive properties. There is potential for applications. The quaternary and pentanery (ZrCuAlNi)_(100-x)Ti_x (x = 0, 2 and 5 at. %) alloys were synthesized by melting 2-3N pure metals in an arc furnace. Amorphous ingots were produced using Cu mold casting technique. The alloys showed wide supercooled liquid region △T_x, high thermal stability and good glass-forming ability (GFA). Many thermal parameters like T_(rg), γ, δ, β and ω were measured employing high temperature differential scanning calorimetry (DSC). Structural characterization was carried out by X-ray diffraction (XRD) technique. Microstrucrural characterization was conducted using high resolution field emission scanning electron microscopy (FESEM) and elemental analysis was done using energy dispersive spectroscopy (EDS). Crystallization behavior and phase formation was studied. Activation energy for crystallization was calculated using Kissinger and Ozawa equations. The alloys show double stage crystallization. Mechanical properties were measured. Compression test was carried out and fracture strength and strain were determined. The fracture behavior was studied which showed veins like patterns, shear bands formation and liquid droplets.
NETL
NSTL
Trans Tech Publications Ltd
